Tales of the Abyss

Complete the Collector's Book by finishing the game two times. Speak to the purple-dressed man at the library in the Daath church to get Jade's "Item Collector" title. Talk to him again with that title to access the Brillante secret shop near the inn in Grand Chokmah.

Successfully complete the game and save the game to unlock the "Game Record" and "Sound Test" options at the title screen, Unknown mode, and Very Hard mode. You can also use your cleared saved game file to start a New Game+ playthrough, which allows access to the Grade Shop.

Complete the game and save after the credits. Then load the cleared saved game file to start a New Game+ playthrough which allows access to the Grade Shop where you can purchase the following items for the indicated amount of Grade. Any leftover Grade will be kept for your next playthrough.

Begin a New Game+ playthrough. Save Shiba and complete the Ortion Cavern (East) side quest. Go to Sheridan then talk to the two men in the northwest part. Talk to Shiba and you will be transported to the Abyss Replica Facility.

Below is a list of unlockables available while playing Tales of the Abyss.

Unlockable

How to unlock

Game Record

Complete the game to have access to this from the title screen.

Grade Shop

Complete the game and save the file. Then, when you start a new game on a new file, you will have access to the grade shop from your complete file.

Sound Test

Complete the game to be able to access this via the main screen.

Unknown Mode

Complete the game once.

Very Hard Mode

Complete the game once.

Abyss Replica Facility Dungeon

Save Shiba, and complete the Ortion Cavern of the EAST side quest, then go to Sheridan, talk to two men in the Northwest of Sheridan. go back to find Shiba again, now you can access to Abyss Replica Facility Dungeon.